摘要
为了使浆液在煤岩体裂隙网络中的流动更加直观,首先引入应力强度因子探讨了压剪和拉剪2种状态下,裂隙尖端的断裂准则、裂隙扩展方向和扩展长度,并分析了浆液在单一裂隙内部的流动扩散规律。在此基础上,利用FORTRAN语言编制了浆液在非贯通裂隙网络内部的流动扩散程序。以某煤矿注浆工程为例,采用该程序模拟了不同注浆压力下浆液在裂隙网络中的扩散范围。模拟结果显示:浆液的扩散极具不均衡性,注浆压力越大,裂隙尖端越容易劈裂,裂隙扩展越长,一定注浆压力下,次生裂隙与其他裂隙沟通后浆液继续流动。当注浆压力为4.0 MPa时,由多孔介质理论计算,本程序模拟与现场探测结果对比分析可知,模拟结果与现场注浆实际符合良好。
In order to make the grout flow more visually in the crack network of the coal and rock mass,the introduction of the stress strength factor was applied to discuss the broken criterion of the crack tip,the crack expansion orientation and expansion length under the pressure shear and tensional shear status and to analyze the flow spreading law of the grout within an unitary crack.Based on the circumstance,the FORTRAN language was applied to write and prepare the flow expansion program of the grout within the non-connected crack network.Taking the mine grouting project as an example,the program was applied to simulate the spreading scope of the grout in the crack network under the different grouting pressure.The simulation results showed that the spreading of the grout would be disproportional.The higher of the grouting pressure,the easier splitting the crack tip would be and the longer the crack expansion would be.Under the certain grouting pressure,the secondary cracking and other cracking could be connected to each other and the grout could flow continuously.When the grouting pressure was 4.0 MPa,the comparison analysis between the porous medium theory calculation,the program simulation and the site exploration showed that the simulation results of the program and the actual site grouting could be well fitted.
出处
《煤炭科学技术》
CAS
北大核心
2011年第10期29-33,共5页
Coal Science and Technology
关键词
煤岩体
非贯通裂隙网络
注浆
扩展
扩散范围
计算机模拟
coal and rock mass
non-connected crack network
grouting
expansion
spreading scope
computer simulation
